微信开发之java获取微信timestamp,nonceStr,signature方法

package com.test.util;  import java.util.UUID;  import java.util.Map;  import java.util.HashMap;  import java.util.Formatter;  import java.security.MessageDigest;  import java.security.NoSuchAlgorithmException;  import java.io.UnsupportedEncodingException;      public class Sign {      public static void main(String[] args) {          String jsapi_ticket =JsapiTicketUtil.getJSApiTicket();;          // 注意 URL 一定要动态获取，不能 hardcode          String url = "http://www.vxzsk.com/xx/x.do";//url是你请求的一个action或者controller地址，并且方法直接跳转到使用jsapi的jsp界面          Map<String, String> ret = sign(jsapi_ticket, url);          for (Map.Entry entry : ret.entrySet()) {              System.out.println(entry.getKey() + ", " + entry.getValue());          }      };    public static Map<String, String> sign(String jsapi_ticket, String url) {          Map<String, String> ret = new HashMap<String, String>();          String nonce_str = create_nonce_str();          String timestamp = create_timestamp();          String string1;          String signature = "";             //注意这里参数名必须全部小写，且必须有序          string1 = "jsapi_ticket=" + jsapi_ticket +                    "&noncestr=" + nonce_str +                    "&timestamp=" + timestamp +                    "&url=" + url;          System.out.println(string1);             try          {              MessageDigest crypt = MessageDigest.getInstance("SHA-1");              crypt.reset();              crypt.update(string1.getBytes("UTF-8"));              signature = byteToHex(crypt.digest());          }          catch (NoSuchAlgorithmException e)          {              e.printStackTrace();          }          catch (UnsupportedEncodingException e)          {              e.printStackTrace();          }             ret.put("url", url);          ret.put("jsapi_ticket", jsapi_ticket);          ret.put("nonceStr", nonce_str);          ret.put("timestamp", timestamp);          ret.put("signature", signature);             return ret;      }         private static String byteToHex(final byte[] hash) {          Formatter formatter = new Formatter();          for (byte b : hash)          {              formatter.format("%02x", b);          }          String result = formatter.toString();          formatter.close();          return result;      }         private static String create_nonce_str() {          return UUID.randomUUID().toString();      }         private static String create_timestamp() {          return Long.toString(System.currentTimeMillis() / 1000);      }  }

package com.test.util;  import java.io.BufferedReader;  import java.io.IOException;  import java.io.InputStreamReader;  import java.net.MalformedURLException;  import java.net.URL;  import java.net.URLConnection;     import net.sf.json.JSONObject;  import com.test.weixin.TestAcessToken;  /***   * @author V型知识库  www.vxzsk.com   *   */  public class JsapiTicketUtil {             /***       * 模拟get请求       * @param url       * @param charset       * @param timeout       * @return       */       public static String sendGet(String url, String charset, int timeout)        {          String result = "";          try          {            URL u = new URL(url);            try            {              URLConnection conn = u.openConnection();              conn.connect();              conn.setConnectTimeout(timeout);              BufferedReader in = new BufferedReader(new InputStreamReader(conn.getInputStream(), charset));              String line="";              while ((line = in.readLine()) != null)              {                               result = result + line;              }              in.close();            } catch (IOException e) {              return result;            }          }          catch (MalformedURLException e)          {            return result;          }                   return result;        }       public static String getAccessToken(){              String appid="你公众号基本设置里的应用id";//应用ID              String appSecret="你公众号基本设置里的应用密钥";//(应用密钥)              String url ="https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid="+appid+"&secret="+appSecret+"";              String backData=TestAcessToken.sendGet(url, "utf-8", 10000);              String accessToken = (String) JSONObject.fromObject(backData).get("access_token");                return accessToken;       }             public static String getJSApiTicket(){           //获取token          String acess_token= JsapiTicketUtil.getAccessToken();          String urlStr = "https://api.weixin.qq.com/cgi-bin/ticket/getticket?access_token="+acess_token+"&type=jsapi";            String backData=TestAcessToken.sendGet(urlStr, "utf-8", 10000);            String ticket = (String) JSONObject.fromObject(backData).get("ticket");            return  ticket;                     }               public static void main(String[] args) {          String jsapiTicket = JsapiTicketUtil.getJSApiTicket();          System.out.println("调用微信jsapi的凭证票为："+jsapiTicket);         }     }